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Merck
CN

79255

Phthalic acid

analytical standard

Synonym(s):

1,2-Benzenedicarboxylic acid

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About This Item

Linear Formula:
C6H4-1,2-(CO2H)2
CAS Number:
88-99-3
Molecular Weight:
166.13
UNSPSC Code:
85151701
NACRES:
NA.24
PubChem Substance ID:
329768344
EC Number:
201-873-2
Beilstein/REAXYS Number:
608199
MDL number:
MFCD00002467

Key Documents

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Product Name

Phthalic acid, analytical standard

InChI key

XNGIFLGASWRNHJ-UHFFFAOYSA-N

InChI

1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12)

SMILES string

OC(C1=C(C(O)=O)C=CC=C1)=O

grade

analytical standard

assay

≥99.5% (GC)
≥99.5% (T)

shelf life

limited shelf life, expiry date on the label

technique(s)

HPLC: suitable
gas chromatography (GC): suitable

impurities

≤0.5% water

mp

210-211 °C (dec.) (lit.)

application(s)

cleaning products
cosmetics
food and beverages
personal care

format

neat

Quality Level

100

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Application

Phthalic acid may be used as an analytical reference standard for the quantification of the analyte in the following:
  • Angelicae Radix and Ligustici Rhizoma using high performance liquid chromatography with photodiode array detection (HPLC-PDA) followed by liquid chromatography coupled to mass spectrometry (LC-MS) and capillary electrophoresis (CE) analyses.
  • Nigella sativa and Solanum nigrum using gas chromatography-mass spectrometry (GC-MS).

Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

General description

Phthalic acid is an organic acid and a major bioactive component, reportedly identified in the extracts of Solanum nigrum, Nigella sativa, Angelicae Radix and Ligustici Rhizoma, utilized as Chinese herbal medicines.

Other Notes

Find a digital Reference Material for this product available on our online platform ChemisTwin® for NMR. You can use this digital equivalent on ChemisTwin® for your sample identity confirmation and compound quantification (with digital external standard). An NMR spectrum of this substance can be viewed and an online comparison against your sample can be performed with a few mouseclicks. Learn more here and start your free trial.

hcodes

H318

pictograms

Corrosion
GHS05

signalword

Danger

Hazard Classifications

Eye Dam. 1

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

334.4 °F

flash_point_c

168 °C

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Certificates of Analysis (COA)

Lot/Batch Number
BCCP2653
BCCM0133
BCCJ9935
BCCF8025
BCCC5540

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Separation and identification of the organic acids in Angelicae Radix and Ligustici Rhizoma by HPLC and CE
Huang Y-W and Sheu J-S
Journal of Separation Science, 29(17), 2616-2624 (2006)
Characterization of alkaloid constitution and evaluation of antimicrobial activity of Solanum nigrum using gas chromatography mass spectrometry (GC-MS)
Jasim H, et al.
Journal of pharmacognosy and phytotherapy, 7(4), 56-72 (2015)
Analysis of bioactive chemical compounds of Nigella sativa using gas chromatography-mass spectrometry
Hadi YM, et al.
Journal of pharmacognosy and phytotherapy, 8(2), 8-24 (2016)
En-Cui Yang et al.
Dalton transactions (Cambridge, England : 2003), 44(7), 3190-3199 (2015-01-13)
Four new 4-amino-1,2,4-triazole (atr)-based coordination polymers, {[Cu2(atr)(H2O)(μ-OH)2(pa)]·H2O}n (), {[Cu3(atr)2(H2O)2(μ-OH)2(npa)2]·2H2O}n (), {[Cu3(atr)5(dca)(μ-OH)(ClO4)2](ClO4)2}n () and {[Cu3(atr)2(H2O)(μ3-OH)(μ-OH)2(spa)]·1.5H2O}n () (pa(2-) = phthalate, npa(2-) = 3-nitrophthalate, dca(-) = dicyanamide and spa(3-) = 4-sulfophthalate), were successfully obtained by varying the carboxylate- and cyanide-modified magnetic bridges. Structural
Xiao-Yan Zhang et al.
Applied and environmental microbiology, 80(22), 6870-6878 (2014-08-26)
EstS1, a newly identified thermostable esterase from Sulfobacillus acidophilus DSM10332, was heterologously expressed in Escherichia coli and shown to enzymatically degrade phthalate esters (PAEs) to their corresponding monoalkyl PAEs. The optimal pH and temperature of the esterase were found to
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